Keeping your favorite 3.5mm Headphones Around The FiiO i1 is an Apple MFi certified, digital-to-analog converter (DAC) and headphone amplifier designed for the Lightning connector. The digital audio signal enters through the Lightning connector end that can be connected to the Apple iPhone/iPod/iPad (and other Apple products), while the analog audio signals are pushed out through the 3.5mm output. The i1 also automatically detects if you are using a standard headphone or one with in-line controls. Just because Apple has ditched the headphone jack doesn't mean you have to ditch your favorite headphones. High-Performance DAC Chip for Better Quality than iPhone's Stock DAC Within the i1 is a high quality chip with both a DAC and a headphone amplifier. Not only does this chip support lossless audio formats, as well as achieve a high signal-to-noise ratio and low distortion, it also supports high-definition voice calls to give you crystal-clear conversations anytime, anywhere. (The i1 currently only supports up to lossless 48kHz audio due to the Lightning Audio Module (LAM) - this may change to up to 192kHz pending changes to the LAM.) High-quality Microphone that Clearly Captures Your Voice Built into the i1 is a high-sensitivity microphone that ensures your voice is clearly heard during calls and recordings - no more miserable conversations due to poor voice quality. Seam Less Metal Body to Perfectly Pair with your iP